I have bought tons of AIS gear from Milltech. I highly recommend them as Doug, the owner, is very customer service focused, and will help you out with any questions or issues.
I've also worked on two boats with the Furuno WiFi radar and have not been impressed. It is great if you don't have a radar now, or want a simple radar, but the resolution is less than I would expect from a Furuno product. Both of those boats used TZ iBoat on the iPad, which is actually not that bad. I run TimeZero on the PC, and the iPad version is a watered down version of that.
For someone who doesn't want to spend $5-10k on a full radar+MFD+AIS setup, the bundle that they're selling is a much cheaper and gives you most of those features.
I myself am finishing up speccing out a brand new complete system for my boat, and considered solutions involving an iPad, but just couldn't see where I wanted to trust my investment to a sub-$1000 device not intended to run for hours and hours in harsh environments, and a WiFi radar
Don't get me wrong - I will still be using an iPad to do most of my planning, and to run TZ and Navionics for reference, but it will be next to my dual PCs and MFDs.